f50ff9877056f39350d45cdd947fc4c313886332d4728c32cc78ebfffb96c806

General

Target

ApplicationReject-668351985.xlsb
Size

1.1MB
MD5

9a785b87d4093c7174b22c2d2043a986
SHA1

9d0f56486ebbb3e4b412029d64849920d4d95bc7
SHA256

a34f9120bb63cf352d632da7df7edd3efc81052809b961db2e7629f18b8412e5
SHA512

3e752f0a41c6c9dfbfabac8ae93be0c957a744a81aa287da2fa29abdaf52c4ae75763fb37c71d3eaec23163ec6f8ccfccc2cf84033f081140730fbd0d6afa950

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://103.155.93.53/427803004.dat

xlm40.dropper

http://87.236.146.69/427803004.dat

xlm40.dropper

http://94.140.114.172/427803004.dat

Signatures

Process spawned unexpected child process 4 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

Regsvr32.exeRegsvr32.exeRegsvr32.exeRegsvr32.exe

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	480	1252	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3952	1252	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1712	1252	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2728	1252	Regsvr32.exe	EXCEL.EXE

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1252 EXCEL.EXE

Suspicious use of SetWindowsHookEx 16 IoCs

Processes:

EXCEL.EXE

pid	process
1252	EXCEL.EXE
1252	EXCEL.EXE
1252	EXCEL.EXE
1252	EXCEL.EXE
1252	EXCEL.EXE
1252	EXCEL.EXE
1252	EXCEL.EXE
1252	EXCEL.EXE
1252	EXCEL.EXE
1252	EXCEL.EXE
1252	EXCEL.EXE
1252	EXCEL.EXE
1252	EXCEL.EXE
1252	EXCEL.EXE
1252	EXCEL.EXE
1252	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 1252 wrote to memory of 480	1252	EXCEL.EXE	Regsvr32.exe
PID 1252 wrote to memory of 480	1252	EXCEL.EXE	Regsvr32.exe
PID 1252 wrote to memory of 3952	1252	EXCEL.EXE	Regsvr32.exe
PID 1252 wrote to memory of 3952	1252	EXCEL.EXE	Regsvr32.exe
PID 1252 wrote to memory of 1712	1252	EXCEL.EXE	Regsvr32.exe
PID 1252 wrote to memory of 1712	1252	EXCEL.EXE	Regsvr32.exe
PID 1252 wrote to memory of 2728	1252	EXCEL.EXE	Regsvr32.exe
PID 1252 wrote to memory of 2728	1252	EXCEL.EXE	Regsvr32.exe

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\ApplicationReject-668351985.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1252

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 /s calc
2⤵
- Process spawned unexpected child process
PID:480

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertu.ooccxx
2⤵
- Process spawned unexpected child process
PID:3952

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertua.ooccxx
2⤵
- Process spawned unexpected child process
PID:1712

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertub.ooccxx
2⤵
- Process spawned unexpected child process
PID:2728

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/480-137-0x0000000000000000-mapping.dmp

Download
memory/1252-130-0x00007FFBBEE90000-0x00007FFBBEEA0000-memory.dmp

Filesize
64KB

Download
memory/1252-131-0x00007FFBBEE90000-0x00007FFBBEEA0000-memory.dmp

Filesize
64KB

Download
memory/1252-132-0x00007FFBBEE90000-0x00007FFBBEEA0000-memory.dmp

Filesize
64KB

Download
memory/1252-133-0x00007FFBBEE90000-0x00007FFBBEEA0000-memory.dmp

Filesize
64KB

Download
memory/1252-134-0x00007FFBBEE90000-0x00007FFBBEEA0000-memory.dmp

Filesize
64KB

Download
memory/1252-135-0x00007FFBBCCD0000-0x00007FFBBCCE0000-memory.dmp

Filesize
64KB

Download
memory/1252-136-0x00007FFBBCCD0000-0x00007FFBBCCE0000-memory.dmp

Filesize
64KB

Download
memory/1712-139-0x0000000000000000-mapping.dmp

Download
memory/2728-140-0x0000000000000000-mapping.dmp

Download
memory/3952-138-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads